Lifting jack for vehicles



April 17, 1928. 1,666,455

J. KLEE ET AL.

LIFTING JACK FOR VEHICLES Filed Sept. 2, 1925 J55 K/fifl Q. f i 55hne/dar //Vl//V70 z Patented Apr. 17, 1928.

' UNITED STATES 1,666,455 PATENT OFFICE- JOSEPH KLEE AND 'ALFONSSCHNEIDER, OF MUN ICE, GERMANY.

LIFTING JACK FOR VEHICLES.

Application filed, September 2, 1925, Serial No. 54,083, and in GermanyJuly 7, 1925.

The invention relates to lifting jacks for vehicles, especially motorcars. One of its objects is to provide a 'ack having improved means forfixing it to the vehicle, and another object is to provide a jack havingmeans whereby it is automatically stopped and thrown over at the end ofthe lifting and lowering operations.

The improved jack maybe actuated by mechanical, pneumatic, hydraulic orelectric power.

The invention is illustrated in the accompanying drawing, showin asexample an apparatus, actuated by mechanical power.

Fig. 1 is a central sectional view showing the jack attached to anautomobile axle.

Fig. 2 is a top plan view.

The apparatus showncomprises 'a hollow screw spindle a, which can berotated in a long sleeve 6 by means of aworm wheel 0 and a worm d. Theworm wheel has'splines c. (Fig. 2) engaging grooves extending throughoutthe length of the spindle. In addition to being screw threadedinternally,

for. engaging the spindle a, the sleeve 6 is externally screw-threaded.and two brackets 7, f are screwed on to it. These brackets can beadjusted, by screwing, so' that they embrace an axle or spring of thevehicle,

as indicated at h, and their free ends can then be drawn togetherslightly by means of abolt 9, so that they tightly grip the axle orspring, thus enabling the jack to be fixed firmly to the vehicle,without requiring any screw holes or spoiling any part of the vehicle.It will be understood that the size of the axle h is a function of thecar weight, the section being comparatively high in heavy cars.Therefore, the clearance between the brackets f, f, and consequently thedistance for which the jack is braced by such brackets, if also afunction of the car weight, that is, the bracing becomes the moreeffective in proportion to the increase in the'weight of the car.

The foot of the jack is movable, so that "there is no breakage when the'ack is erected from an inclined position, an consists of ahemispherical cup 73 having screwed into it a pin is with a ball at itsend, bearin against arod Z in the hollow spindle, and being held againstthe same by a screwcap m which forms a socket for the ball andthroughwhich the pin-passes. The base of the cap m is recessed in the viciniorder to permit oscillation o the pin 70. The

of the ball in cap has a flange m and the cup 2' has a boss 2', whichlimits the extent to which the foot can rock, as the boss lies in thepath of the flange m. With this arrangement there is no reat strain onthe ball joint, and if the vehic e has been jacked up on a slope itstendency to move is much reduced.

Vhether the jack is actuated hydraulicalposition, so that the contactarm q is pressed against a contact 9 which is connected by way of aswitch 1' 8 c to the negative terminal of the battery. If the positiveterminal of the battery is connected by a throw overswitch t, to theother terminal of the motor by way of a sliding contact u the circuit ofthe latter is thus closed. and the motor actuates the jack. The spindlethen moves downwards, while the vehicle is lifted, till the collarthereon strikes a collar 12, at the lower end of the rod gr. By thismeans the contact arm q is pulled downwards, away from the contact 9 andonto a contact 9 This breaks the circu t and the spindle stops.

By moving the switch arms 8 t to positions 8 and t respectively, andinto contact with contacts u and '1)", the contact q is connected, byway of a contact r and the switch 8 to the positiveterminal of thebattery,

and the motor is connected to the negative terminal. The motor is thusdriven in the opposite direction, and the vehicle is lowered, till thespindle reaches the collar p and lifts it, to shift the contact arm q tothe-dead contact 9. Throwing over the levers s and It. you may start thejack working again and again.

What we claim as our invention and desire to secure by Letters Patent ofthe United States is 1. A vehicle jack comprising a tubular casing. athreaded spindle adapted to engage the thread on the inside of saidcasing, means for rotatin said spindle, a thread'on the outside of saicasing, and brackets de- Leeaeee fining threaded holes seated on saidcasing a thread on the outside of said casing, and W and adapted toengage between them a part brackets defining threaded holes seatedon ofthe vehicle. v said casing and adapted to engage between 2. A vehiclejack comprising a tubular them a part of the vehicle. d easing, athreaded spindle adapted to engage I itne whereof we have signed thisthe thread on the inside of said casing, a e ifi tio I base. plate onthe lower end of said spindle, v

means for rotating said spindle arranged in- JOSEPH KLEE. termediatesaid spindle and said base plate, ALFONS SCHNEIDER.

